Disclosure of Invention
Therefore, in order to solve the problem of low efficiency of the conventional manual harness wire separation, a harness wire separating machine capable of improving harness wire separation efficiency is needed.
A heddle dividing machine comprising:
the device comprises a rack, a lifting mechanism and a lifting mechanism, wherein the rack is used for fixing a heald frame provided with double rows of healds;
the sliding component is connected with the rack in a sliding manner;
the first power part is fixedly connected with the sliding part and is used for driving the sliding part to move away from or towards the heald frame along the frame;
the propelling component is arranged on the frame and is positioned on one side of the sliding part, which is far away from the heald frame;
the harness wire clamp is abutted to the pushing assembly, the pushing assembly pushes the harness wire clamp to move towards the sliding part, and the harness wire clamp is used for clamping harness wires in the same row in the double rows of harness wires;
the harness wire clip library is fixedly connected with the rack and used for placing harness wire clips;
the clamping component is arranged on the sliding component and can move away from or close to the harness cord clamp; the clamping component clamps the harness wire clamp pushed from the propelling component;
the second power part is fixedly connected with the sliding part;
the separation screw rod is fixedly connected with the second power part and comprises a first separation screw rod and a second separation screw rod, and the second power part drives the first separation screw rod and the second separation screw rod to rotate, so that the first separation screw rod and the second separation screw rod can be inserted into a seam between the double rows of heddles; and
the separating component is fixedly connected with the harness wire clamping library, the separating component is located between the first separating screw rod and the second separating screw rod, so that when the sliding component is far away from the harness frame to move, the first separating screw rod and the second separating screw rod bring out the double-row harness wires clamped by the harness wire clamp, and the separating component is jacked into a seam between the double-row harness wires to separate the double-row harness wires.
The heddle dividing machine is characterized in that a frame is used for placing a heald frame provided with double rows of heddles, a first power part is used for driving a sliding part to move away from or towards the heald frame along the frame, a heddle clamp storehouse is fixedly connected with the frame, heddle clamps are arranged in the heddle clamp storehouse and are abutted with a pushing assembly, the pushing assembly arranged on the frame pushes the heddle clamps to move towards the sliding part, a clamping part arranged on the sliding part clamps the heddle clamps pushed by the pushing assembly, the heddle clamps are used for clamping the heddles positioned in the same row of the double rows of heddles, a separating screw rod is fixedly connected with a second power part arranged on the sliding part, and the separating screw rod comprises a first separating screw rod and a second separating screw rod, the second power part drives the separating screw rod to rotate, the separating part is fixedly connected with the harness wire clamping warehouse, and the separating part is located between the first separating screw rod and the second separating screw rod, so that when the first power part drives the sliding part to move towards the direction of the harness frame, the second power part drives the first separating screw rod and the second separating screw rod to rotate, the first separating screw rod and the second separating screw rod can be inserted into a seam between the double rows of harness wires, when the first power part drives the sliding part to move towards the direction away from the harness frame, the second power part stops rotating, the separating part is pushed into the seam between the double rows of harness wires to separate the double rows of harness wires into two single rows of harness wires, automatic separation is achieved, and separating efficiency of the harness wires is improved.
In one embodiment, the device further comprises a belt and a forward and backward screw rod, the first power part is connected with the belt, the forward and backward screw rod is arranged on the sliding part, and the forward and backward screw rod is positioned between the separation screw rod and the separation part; the belt is sleeved on the advancing and retreating screw rod; the first power part drives the advancing and retreating screw rod to rotate by driving the belt to move, and then drives the sliding part to slide along the rack.
In one embodiment, when the separating member is pushed into the slit between the double rows of heddles, the separating member is located at a position of a central axis of the double rows of heddles, and the extending direction of the central axis coincides with the sliding direction of the sliding member.
In one embodiment, the heald frame comprises a first heald frame, a second heald frame and a connecting part for connecting the first heald frame and the second heald frame; the connecting portion is rotatably connected to the first heald frame and rotatably connected to the second heald frame such that the second heald frame can move away from or toward the first heald frame; the first heald frame of the heald frame is connected with the frame in a sliding way, and the heald frame moves away from or close to the sliding part along the frame; the second heald frame is provided with the heald frame.
In one embodiment, the heald frame further comprises an adjusting member and a fixing member, the fixing member is fixedly connected with the first heald frame, the adjusting member is in threaded connection with the fixing member, and the adjusting member is in threaded connection with the second heald frame, so that the adjusting member fixes the second heald frame when the second heald frame stops moving.
In one embodiment, the propelling assembly comprises a third power component and a propelling strip, the third power component is mounted on the frame, one end of the propelling strip is connected with the third power component, and the other end of the propelling strip abuts against the heddle clamp.
In one embodiment, the harness clip comprises a first harness clip, a second harness clip, a third harness clip and a fourth harness clip, and after the harness clip is pushed out from the pushing assembly, the first harness clip and the second harness clip are both positioned on one side of the separating part close to the first separating screw; the third harness wire clamp and the fourth harness wire clamp are both located on one side, close to the second separation screw, of the separation part, the first harness wire clamp and the third harness wire clamp are used for clamping one of the two rows of harness wires, and the second harness wire clamp and the fourth harness wire clamp are used for clamping the other row of harness wires.
In one embodiment, the number of the clamping parts is four, the clamping parts correspond to the heddle clamps one by one, and the clamping parts are used for applying force to the heddle clamps to open the heddle clamps.
In one embodiment, the clamping member is a clamping cylinder.
In one embodiment, the device further comprises a control device, wherein the control device is connected with the first power component and is used for controlling the first power component to rotate; the control device is connected with the propelling component and is used for controlling the propelling component to push the harness wire clamp to move towards the sliding part; the control device is connected with the clamping component and is used for controlling the clamping component to move so that the clamping component clamps the harness wire clip; the control device is connected with the second power component and is used for controlling the second power component to rotate.
Detailed Description
As described in the background art, the double rows of heddles are usually separated manually, resulting in low separation efficiency.
After further research, in one embodiment, a heddle dividing machine is provided and comprises a frame, a sliding part, a first power part, a pushing assembly, a heddle clamp library, a clamping part, a second power part, a separating screw rod and a separating part. The frame is used for arranging a heald frame provided with double rows of healds. The sliding component is connected with the frame in a sliding way. The first power part is fixedly connected with the sliding part and is used for driving the sliding part to move away from or towards the heald frame along the frame. The pushing component is arranged on the frame and is positioned on one side of the sliding part, which is far away from the heald frame. The harness wire clamp is abutted to the pushing assembly, the pushing assembly pushes the harness wire clamp to move towards the sliding part, and the harness wire clamp is used for clamping harness wires in the same row in double rows of harness wires. The harness wire clamping warehouse is fixedly connected with the rack and used for placing harness wire clamps. The clamping component is arranged on the sliding component, moves away from or close to the harness wire clamp, and clamps the harness wire clamp pushed from the propelling component. The second power component is fixedly connected with the sliding component. The separating screw rod is fixedly connected with the second power part, the separating screw rod comprises a first separating screw rod and a second separating screw rod, and the second power part drives the first separating screw rod and the second separating screw rod to rotate, so that the first separating screw rod and the second separating screw rod can be inserted into a gap between double rows of heddles. The separating component is fixedly connected with the heddle clamp storehouse and is positioned between the first separating screw rod and the second separating screw rod, so that when the sliding component moves away from the heddle frame, the first separating screw rod and the second separating screw rod bring out double rows of heddles clamped by the heddle clamp, and the separating component is pushed into a seam between the double rows of heddles to separate the heddles.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1 and 2, the heddle dividing machine 100 of an embodiment includes a frame 110, a sliding member 111, a first power member, a pushing assembly, a heddle clamp 112, a heddle clamp magazine 113, a clamping member, a second power member, a separating screw, and a separating member 114. The heddle separating machine 100 is used for separating double rows of heddles. The double rows of the heddles mean that the heddles are distributed in two rows, and the two rows of the heddles are alternately distributed. Thus, adjacent heddles are located in different rows, and the heddles located in the same row need to be separated out. Double rows of heddles are mounted on a heald frame 200. The heald frame 200 may be made of an aluminum alloy, thereby making the heald frame 200 lightweight, strong, and relatively smooth. The frame 110 may be formed by welding stainless steel tubes. Wherein the side of the frame 110 remote from the heald frame 200 may be provided with wheels, so that the heddle machine 100 can be moved.
In particular, the heald frame 200 is fixed to the frame 110. It should be noted that the heald frame 200 may be fixedly connected to the frame 110 by means of a snap-fit connection or the like. In one embodiment, the heddle machine 100 further comprises a heddle frame 115, the heddle frame 115 being slidably connected to the frame 110. The heald frame 115 is used to fix the heald frame 200. Specifically, the heald frame 115 includes a first heald frame 115a, a second heald frame 115b, and a connecting portion 115c. The connecting portions 115c are rotatably connected to the first heddle frame 115a and the second heddle frame 115b, respectively, so that the second heddle frame 115b moves away from or toward the first heddle frame 115a, thereby making it possible to adjust the height of the heddle frame 115. The first heald frame 115a is slidably coupled to the frame 110 so that the frame 115 can move along the frame 110 away from or toward the sliding part 111, and the second heald frame 115b is used to hold the heald frame 200. So that the distance between the heald frame 200 and the sliding part 111, that is, the distance between the double row of heddles and the sliding part 111 can be adjusted by sliding the heald frame 115. While the height of the heald frame 115 relative to the frame 110 may be adjusted to facilitate the placement of the heald frame 200. It should be noted that pulleys may be provided on a side of the first heald frame 115a adjacent to the frame 110, and corresponding rails may be installed on the frame 110 so that the heald frame 115 slides along the frame 110. Further, the connecting portions 115c may be hinge-connected to the first and second heald frames 115a and 115b, respectively. The harness frame 115 may be welded by a square stainless steel pipe.
In one embodiment, the second heald frame 115b may be provided with a plurality of plates disposed at intervals, and the heald frame 119 may be placed at the interval between the adjacent plates. The plate may be made of an alloy, the periphery of which is smooth and hard, and the plate and the frame 115 may be connected by welding.
In one embodiment, in order to better fix the heddle frame 115, the heddle divider 100 further comprises an adjusting part 116 and a fixing part 117. The fixing member 117 is fixedly connected to the first heald frame 115. The adjusting member 116 is screwed with the fixing member 117, and the adjusting member 116 is screwed with the second heald frame 115 b. So that the second heddle frame 115b can be fixed by turning the adjusting part 116 when the second heddle frame 115b stops moving relative to the first heddle frame 115 a. The adjustment member 116 may also be rotated when the heddle frame 115 needs to be moved. The fixing member 117 may be fixedly coupled to the first heald frame 115a by welding, and the fixing member 117 may also be made of stainless steel.
Referring again to fig. 1, the sliding member 111 is slidably coupled to the frame 110. In one embodiment, a pulley may be installed on one side of the sliding member 111 close to the frame 110, and a rail adapted to the pulley may be provided on the frame 110. The sliding member 111 may be a trolley, which may be welded from square stainless steel tubing. Referring again to fig. 2, the first power member 118 is fixedly connected to the sliding member 111, and the first power member 118 is used for driving the sliding member 111 to move along the frame 110 away from or towards the heald frame 200. In one embodiment, the first power component 118 is a motor. It should be noted that the first power member 118 may be fixed to the sliding member 111 by a first fixing frame 119. The first fixing frame 119 may be formed by welding stainless steel, and the first fixing frame 119 and the sliding member 111 are fixedly connected by welding.
In one embodiment, the heddle dividing machine 100 further comprises a belt 120 and an advancing and retreating screw rod 121, the first power part 118 is connected with the belt 120, and the advancing and retreating screw rod 121 is arranged on the sliding part 111. The belt 120 is sleeved on the advance and retreat screw rod 121. The first power member 118 drives the advancing and retreating screw rod 121 to rotate by driving the belt 120 to move, and further drives the sliding member 111 to slide along the frame 110. As shown in fig. 2, the number of the advance/retreat screws 121 may be four, two of the four advance/retreat screws 121 being front advance/retreat screws, and the other two being rear advance/retreat screws. Therefore, when the sliding part 111 moves towards the direction of the heald frame, the first power part 118 drives the belt 120 to move, and then the belt 120 drives the front advance and retreat screw rod 121 to rotate, and the advance and retreat screw rod drives the rear advance and retreat screw rod to rotate, so that the sliding part 111 moves towards the direction of the heald frame. Similarly, when the sliding member 111 moves away from the heald frame, the first power member 118 drives the belt 120 to move, and the belt 120 drives the rear and rear screw rod to rotate, and the rear and rear screw rod drives the front and rear screw rod to rotate, so that the sliding member 111 moves away from the heald frame. It should be noted that the first power member 118 may directly drive the sliding member 111 to slide, or the first power member 118 may drive the sliding member 111 to slide by matching with a gear. Wherein the advancing and retreating screw rod 121 is positioned between the separating screw rod and the separating member 114, so that the movement of the advancing and retreating screw rod 121 does not affect the movement of the separating screw rod and the separating member 114. When the number of the advance and retreat screw rods is four, two rear advance and retreat screw rods are located between the first separation screw rod and the separation member 114, and two advance and retreat screw rods are located between the second separation screw rod and the separation member 114. The belt 120 may be made of rubber, among others. It should be noted that the backward threading rod may be fixed to the first fixing frame 119, and the forward threading rod may be fixed to the sliding member 111 by the second fixing frame. The advance and retreat screw 121 may be made of stainless steel.
The pushing member is provided on the frame 110, and the pushing member is located on a side of the sliding part 111 away from the heald frame. Specifically, the heddle clamp 112 abuts against the pushing member, the pushing member pushes the heddle clamp 112 to move towards the sliding member 111, and the heddle clamp 112 is used for clamping heddles positioned in the same row in double rows of heddles. The harness clip 112 is mounted in a harness clip storage 113, the harness clip storage 113 is fixedly connected with the frame 110, and the harness clip storage 113 is also located on the side of the sliding part 111 far away from the harness. The harness clip storage 113 may be formed by welding stainless steel strips.
In one embodiment, as shown in fig. 1, the propelling assembly includes a third power member 122 and a propelling strip 123, the third power member 122 is mounted on the frame 110, one end of the propelling strip 123 is connected to the third power member 122, and the other end of the propelling strip 123 abuts against the heddle clamp 112. In this embodiment, the number of the propelling strips 123 is two, and the two propelling strips 123 are symmetrically distributed. So that the number of the heald clips 112 pushed out each time is two, and two rows of healds in the double rows of healds can be respectively clipped. In one embodiment, the third power member 122 is a cylinder, so that one end of the push bar 123 is fixedly connected with the piston of the third power member 122. Wherein, the propelling strip 123 may be made of stainless steel, and the housing of the third power component 122 may be made of aluminum alloy. In addition, referring again to FIG. 1, the third power component 122 may be fixedly coupled to the frame 110 via a third fixing frame 124. The third fixing frame 124 may be formed by welding a stainless steel square tube.
In one embodiment, harness clip 112 includes a first harness clip, a second harness clip, a third harness clip, and a fourth harness clip. When the heddle clip 112 is pushed out of the pusher assembly, both the first heddle clip and the second heddle clip are located on the side of the separator part 114 which is adjacent to the first separator screw 128 a. The third harness clip and the fourth harness clip are both located on the side of the separating member 114 near the second separating screw 128b. The first harness wire clamp and the third harness wire clamp are used for clamping one row of harness wires in the double rows of harness wires, and the second harness wire clamp and the fourth harness wire clamp are used for clamping the other row of harness wires in the double rows of harness wires. That is, each push bar 123 pushes out a pair of harness clips 112. In the present embodiment, the push-in bar 123 remote from the frame 110 pushes out the first and second harness clips, and the push-in bar 123 close to the frame 110 pushes out the third and fourth harness clips. The first harness wire clamp and the third harness wire clamp two ends of one row of harness wires in the double-row harness wires, and the second harness wire clamp and the fourth harness wire clamp two ends of the other row of harness wires in the double-row harness wires.
As shown in fig. 3, the harness clip 112 includes a first portion 125 and a second portion. The second portion includes a body 126 and a curved portion 127 extending from the body 126. The first portion 125 is symmetrical to the body 126. So that the push bar 123 can abut against the bent portion 127. It should be noted that the harness clip 112 may hold one of the two rows of heddles, and the harness clip 112 may also hold a portion of one of the two rows of heddles.
When the third power member 122 moves the push bar 123 to disengage the harness clip 112 from the harness clip storage 113 and push the harness clip 112 to the holding member provided on the slide member 111, the holding member holds the harness clip 112 and simultaneously opens the harness clip 112. So that the clamping member slides with the sliding member 111 so that the harness clip 112 is inserted into the slit between the two rows of harnesses and can clamp the two rows of harnesses in the two rows of harnesses. In this embodiment, the clamping member clamp forces the bend 127 so that the heddle clamp 112 opens when the clamping member is in contact with the heddle clamp 112.
Referring again to FIG. 2, in one embodiment, the number of gripping members is four. Each heddle clip 112 has a clamping part for applying a force to the heddle clip 112 such that the heddle clip 112 opens. The holding member is located on a side of the bent portion 127 away from the first portion 125. The housing of the clamping member may be made of an aluminum alloy. In one embodiment, the clamping member is a clamping cylinder.
The second power component is fixedly connected with the sliding component 111, and the second power component drives the separation screw rod to rotate. Specifically, the separating screw is fixedly connected with the second power part, and the separating screw includes a first separating screw 128a and a second separating screw 128b. The second power member rotates the separation screw so that the first separation screw 128a and the second separation screw 128b can be inserted into the slit between the double rows of heddles. So that the first and second separating screws 128a and 128b are pushed into the gap between the double rows of heddles to primarily separate the double rows of heddles. In one embodiment, the second power component is a motor. In one embodiment, the first and second separating screws 128a, 128b are symmetrically disposed. Wherein, the separation lead screw can be made by stainless steel, is difficult for buckling. The housing of the second power component may be made of an aluminum alloy. It should be noted that the second power component may be fixedly connected to the sliding component 111 through a fourth fixing frame.
The separating member 114 is fixedly connected with the heald clamping storehouse 113, the separating member 114 is positioned between the first separating screw rod 128a and the second separating screw rod 128b, so that when the sliding member 111 moves away from the heald frame, the separating screw rod takes out the double rows of healds clamped by the heald clamp 112, and the separating member 114 pushes into the seam between the double rows of healds to separate the healds. In one embodiment, the separating member 114 is a top knife. In one embodiment, when the separating member 114 is pushed into the slit between the double rows of heddles, the separating member 114 is located at a position of a central axis of the double rows of heddles, wherein the central axis extends in a direction coinciding with the sliding direction of the sliding member 111. At this time, the first and second separating screws 128a and 128b are symmetrically arranged with respect to the separating member 114. When the number of the advancing-retreating screw rods 121 is four, the four advancing-retreating screw rods 121 may be symmetrically arranged with respect to the separating member 114. Among them, the separating member 114 may be made of stainless steel.
The process of the double-row harness wire separating operation of the harness wire separating machine 100 is as follows: which places the heald frame with the double rows of heddles on the heald frame 115. The harness clip magazine 113 is filled with harness clips 112. After the machine is started by pressing a start key, the third power part 122 drives the pushing strips 123 to push a preset distance towards the sliding part 111, each pushing strip 123 pushes the two harness wire clamps 112 to enter the clamping part, the clamping part is opened to clamp the harness wire clamps 112, and meanwhile, the harness wire clamps 112 are opened at the moment of being clamped. At this time, the first power member 118 starts to rotate forward to drive the belt 120 to move, the belt 120 drives the advance and retreat screw rod 121 to rotate, so that the sliding member 111 moves toward the direction of the heald frame, and at the same time, the second power member rotates forward to drive the first separation screw rod 128a and the second separation screw rod 128b to rotate forward and to drill into the seam between the double rows of healds. At the same time, the four harness clips 112 also enter between the gaps of the double rows of harnesses, and the first power part 118 and the second power part stop rotating after the first separation screw 128a and the second separation screw 128b rotate forward for a predetermined number of revolutions. At the moment, all the clamping parts return, the first harness wire clamp and the third harness wire clamp rebound and respectively clamp two ends of one row of harness wires, and the second harness wire clamp and the fourth harness wire clamp rebound and respectively clamp two ends of the other row of harness wires. And then the first power part 118 is started, the first power part 118 rotates reversely, the second power part does not rotate at rest, and the second power part drives the sliding part 111 to move in the direction away from the heald frame in a reverse transmission manner, so that the heald clamped by the heald clamp 112 is pulled out from the heald frame. During the movement of the sliding part 111 away from the heald frame, the separating part 114 pushes into the heald gap to push the two rows of not-separated healds open, so that the two rows of not-separated healds automatically fall into a single row of healds clamped by the heald clamp 112.
The heddle dividing machine 100 not only improves heddle dividing efficiency, but also reduces cost, increases yield and reduces labor and time. In addition, the harness wire can be prevented from being easily bent and damaged in the manual separation process and being incapable of being used. The rotation speeds and the number of rotations of the first power component 118 and the second power component can be set according to actual needs.
In one embodiment, the heddle dividing machine 100 further comprises a control device electrically connected to the first power member 118, the control device being configured to control the first power member 118 to rotate. The control device is electrically connected with the propelling component and is used for controlling the propelling component to push the harness wire clamp 112 to move towards the sliding part 111. A control device is connected to the clamping part, which control device is used to control the movement of the clamping part such that the clamping part clamps the heddle clamp 112. The control device is connected with the second power component and is used for controlling the second power component to rotate.
In one embodiment, the device further comprises a sensing element, and the sensing element is electrically connected with the control device. The sensing element is mounted on the propulsion assembly and transmits the motion information of the propulsion assembly to the control device, which controls the motion of the first power component 118, the second power component and the clamping component, respectively. Wherein the motion information is the advancing distance of the advancing assembly.
Specifically, after the control device controls the propelling component to propel a preset distance in the direction of the sliding component 111, the sensing element transmits a motion signal of the propelling component to the control device, the control device controls the clamping component to push out, at the moment, the first power component 118 and the second power component rotate forwards, the first power component 118 drives the sliding component 111 to move in the direction of the heald frame, and the separation screw rod moves along with the sliding component 111. At the same time, the clamping part with the harness cord clip 112 is inserted into the gap between the double rows of harness cords and clamps the harness cords. At this time, the separating screw rod is also inserted into the seam between the two rows of heddles to separate them initially. After the separating screw motor rotates for a preset number of turns, all the power parts stop rotating, the control device controls the clamping parts to move towards the direction far away from the heald frame, and the heald clamp 112 rebounds to clamp the healds. The control device controls the first power component 118 to start reversing to pull the heddles clamped by the heddle clamp 112 backwards and out, and the separating component 114 is inserted into the seam between the double rows of heddles to separate the heddles. In one embodiment, the sensing element is a sensor, and the control device is a PLC (Programmable Logic Controller).
In one embodiment of the display device, the display device further comprises an input module and a display module, the display module is electrically connected with the control device, and the input module is electrically connected with the control device. The input device is used for inputting information. The control device receives the input information of the input module and displays the input information in the display module, thereby further realizing automatic control. The functions of the input module and the display module can be integrated on the touch screen, and the touch screen simultaneously realizes the input function and the display function, so that the operation is more convenient.
In the heddle dividing machine 100, a frame 110 is used for placing a heald frame provided with double rows of heddles, a first power part 117 is used for driving a sliding part 111 to move away from or towards the heald frame 110, a heddle clamp storehouse 113 is fixedly connected with the frame 110, a heddle clamp 112 is arranged in the heddle clamp storehouse 113, the heddle clamp 112 is abutted with a propelling component, the propelling component arranged on the frame 110 pushes the heddle clamp 112 to move towards the sliding part 111, a clamping part arranged on the sliding part 111 clamps the heddle clamp 112 pushed by the propelling component, a separating screw rod is fixedly connected with a second power part arranged on the sliding part 111, the separating screw rod comprises a first separating screw rod 128a and a second separating screw rod 128b, the first separating screw rod 128a and the second separating screw rod 128b are symmetrically distributed, the second power part drives the separating screw rods to rotate, the separating part 114 and the harness wire clamp 112 bin are fixedly connected with the separating part 114 and are positioned between the first separating screw rod 128a and the second separating screw rod 128b, so that when the first power part 118 drives the sliding part 111 to move towards the direction of the harness frame, the second power part drives the separating screw rods to rotate, the separating screw rods can be inserted into the seams between the double rows of harness wires, when the first power part 118 drives the sliding part 111 to move towards the direction far away from the harness frame, the second power part stops rotating, the separating part 114 is pushed into the seams between the double rows of harness wires to separate the double rows of harness wires into single rows of harness wires, automatic separation is realized, and the separating efficiency of the harness wires is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.